The Wales and British Lions international player Leigh Halfpenny has described Keelan Giles as a “huge talent” ahead of the Osprey wing’s possible Wales debut against Japan.

If Giles takes part in the match at the Principality Stadium on Saturday then he will emulate peers such as George North and Tom Prydie by making his debut as an 18 year old.

So far this season he has scored eight tries in just five games for the Ospreys and he was recently promoted to Wales’ autumn Test squad.

Halfpenny, who is a full-back for Wales, made his Test debut when he was 19 against South Africa and like Giles he emerged from rugby’s junior ranks in the Swansea area.

Speaking about Keelan, Giles said, “Keelan is doing well. He has put in some fantastic performances for the Ospreys. He is a huge talent. I remember seeing him play one Sunday morning at mini rugby level – under-eights or under-nines, I think – and you could see there was something there.”

Wales’ interim head coach Rob Howley will not be naming his starting line-up until tomorrow but it is widely expected for him to include young prospects such as Giles, Ospreys fly-half Sam Davies and Newport Gwent Dragons lock Cory Hill.

However, much of the team that defeated Argentina earlier this week is expected to be retained following the previous week’s defeat to Australia in order to try and keep momentum going as they move towards hosting South Africa next week.

Halfpenny added that after the win against Argentina “it was a lot happier dressing room. We were disappointed with our performance against Australia. We were looking for a reaction (against Argentina), and we certainly got that. But we are not getting too ahead of ourselves. We are pleased with the performance – it was important to get the win for confidence and momentum – and the focus will now turn to Japan and we will prepare well for that one.”